Messelite
次磷钙铁矿
🗣️ 情景例句
How many classes are you taking this semester?
这学期你有多少课？
We can live without our friends, but not without our neighbours.
生活可无友，邻居不能无。
The tour should last about an hour and a half.
这次参观大概需要一个半小时。